fix output broadcastable flags in GpuDot22, GpuGemm

theano/sandbox/cuda/blas.py

@@ -19,7 +19,9 @@ class GpuDot22(Op):
             raise TypeError(x)
         if y.type.ndim != 2:
             raise TypeError(y)
-        return Apply(self, [x,y], [x.type()])
+        otype = CudaNdarrayType(
+                (x.type.broadcastable[0], y.type.broadcastable[1]))
+        return Apply(self, [x,y], [otype()])
 
     def c_code_cache_version(self):
         return (1,1)
@@ -87,7 +89,9 @@ class GpuDot22Scalar(Op):
             raise TypeError(y)
         if not tensor.blas._as_scalar(a):
             raise TypeError(a)
-        return Apply(self, [x,y,a], [x.type()])
+        otype = CudaNdarrayType(
+                (x.type.broadcastable[0], y.type.broadcastable[1]))
+        return Apply(self, [x,y,a], [otype()])
 
     def c_code_cache_version(self):
         return (1,1)